RQC Seminar

97th RQC Seminar

  • Speaker

    Prof. Simone De Liberato
    ( School of Physics and Astronomy, University of Southampton, UK )

  • Date

    16:00-17:00, November 20, 2023 （Monday)

  • Venue

    Hybrid(ZOOM・ Wako Main Research 3F 345-347 Seminar Room　C01）

  • Title

    Weaving quantum materials with light

  • Inquiries

    rqc_info[at]ml.riken.jp

Abstract
When the coupling between the confined electromagnetic field and the electronic degrees of freedom of a solid-state system becomes comparable to other energy scales, we can access novel non-perturbative phenomenology. Light-matter interaction can then modify the electronic and photonic wavefunctions and the related material properties. Solid-state cavity quantum electrodynamics can thus become a tool for quantum material engineering, allowing us to drastically enrich the catalogue of materials available for scientific and technological applications.

In this talk I will show how the real-space configuration of both electronic [1], [2] and photonic [3] degrees of freedom can be manipulated using polaritonic effects, highlighting some potential applications in fundamental physics [4], [5] and discussing novel theoretical approaches to study these non-perturbative phenomena [6], [7].

References
[1] S. Brodbeck et al., ‘Experimental Verification of the Very Strong Coupling Regime in a GaAs Quantum Well Microcavity’, Phys. Rev. Lett. 119, 027401 (2017).
[2] E. Cortese et al., ‘Excitons bound by photon exchange’, Nat. Phys. 17, 31 (2021).
[3] E. Cortese, J. Mornhinweg, R. Huber, C. Lange, and S. De Liberato, ‘Real-space nanophotonic field manipulation using non-perturbative light–matter coupling’, Optica 10, 11 (2023).
[4] E. Cortese, D. B. Cassidy, and S. De Liberato, ‘Positronium density measurements using polaritonic effects’, Phys. Rev. A 107, 023306 (2023).
[5] S. Rajabali, E. Cortese, M. Beck, S. De Liberato, J. Faist, and G. Scalari, ‘Polaritonic nonlocality in light–matter interaction’, Nat. Phot. 15, 690 (2021).
[6] E. Cortese, I. Carusotto, R. Colombelli, and S. De Liberato, ‘Strong coupling of ionizing transitions’, Optica 6, 354 (2019).
[7] E. Cortese and S. De Liberato, ‘Exact solution of polaritonic systems with arbitrary light and matter frequency-dependent losses’, J. Chem. Phys. 156, 084106 (2022) .


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